As far as: "How can i assure that customer does not have my product anymore with him?" goes, there is nothing you can do.
So i noticed that someone bought a 3d printable model that i'm selling, and after a really long time, for some unknown reason, just refunded my product, and i don't even know why that happened?
My products works just fine, its print tested. Because of that, i lost a cool money without even knowing why that happened. How can i assure that customer does not have my product anymore with him?
As far as: "How can i assure that customer does not have my product anymore with him?" goes, there is nothing you can do.
Usually (as says "?" sign under the word "Refunded") the reason is "Payment reversal - no cardholder authorization" (somebody used false credit card to "buy" your model). The lag between the fraudulent card use and "refund" may take days and may take months...
In order to post an answer, you need to sign in.